| Figure 7 - An isometric view with dimensions |
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We have "dimensioned" the object in the isometric drawing in figure 7. As a
general guideline to dimensioning, try to think that you would make an object and
dimension it in the most useful way. Put in exactly as many dimensions as are necessary
for the craftsperson to make it -no more, no less. Do not put in redundant dimensions. Not
only will these clutter the drawing, but if "tolerances" or accuracy levels have
been included, the redundant dimensions often lead to conflicts when the tolerance
allowances can be added in different ways.
Repeatedly measuring from one point to another will lead to inaccuracies.
It is often better to measure from one end to various points. This gives the
dimensions a reference
standard. It is helpful to choose the placement of the dimension in the order
in which a
machinist would create the part. This convention may take some experience.
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